LDN 909 & DWB 111
Above image awarded AAPOD 2 on 7th August 2021
Commonly known as the propeller nebula the ‘propeller’ shape actually consists of two catalogued parts: DWB 111 & DWB 119.
The DWB catalog was compiled by H. R. Dickel, H. Wendker and J. H. Bieritz cataloging 193 distinct objects as part of their study of H-alpha emission nebula in the Cygnus X region of the sky.
This is part of a much larger complex known as Simeis 57 in Cygnus, discovered in the early 50’s. The distance to the nebula is not known.
NB DWB 111 is just a small part of this image. There is another very faint OIII object in the frame - if I can add to this and bring it out, I will add further info at a later date. LDN 909 refers to the dark area just right of centre.
Imaging telescope: Takahashi FSQ130ED
Imaging cameras: FLI ML16200
Mounts: Takahashi EM 400 Temma 2M
Guiding cameras: QHY CCD QHY 5 II
Focal Extender / Reducer: Tak QE 0.73x
Software: PHD 2, Astro Pixel Processer, PixInsight , Sequence Generator Pro SGP
Filters: Astrodon SII, Ha, OIII, + Astrodon RGB
Accessories: ATIK EFW3
Original Resolution: 4416 x 3596
Dates: Jul 18 - Aug 4, 2021
Frames:
Astrodon Ha: 42 x 600"
Astrodon SII: 45 x 600"
Astrodon OIII: 48 x 600"
Astrodon RGB: 3 x 10 x 180"
Integration: 24 Hours.
Center (RA, Dec):(304.569, 44.821)
Center (RA, hms):20h 18m 16.586s
Center (Dec, dms):+44° 49' 16.927"
Size:3.18 x 2.59 deg
Radius:2.052 deg
Pixel scale:2.59 arcsec/pixel
Orientation:Up is 234 degrees E of N
The DWB catalog was compiled by H. R. Dickel, H. Wendker and J. H. Bieritz cataloging 193 distinct objects as part of their study of H-alpha emission nebula in the Cygnus X region of the sky.
This is part of a much larger complex known as Simeis 57 in Cygnus, discovered in the early 50’s. The distance to the nebula is not known.
NB DWB 111 is just a small part of this image. There is another very faint OIII object in the frame - if I can add to this and bring it out, I will add further info at a later date. LDN 909 refers to the dark area just right of centre.
Imaging telescope: Takahashi FSQ130ED
Imaging cameras: FLI ML16200
Mounts: Takahashi EM 400 Temma 2M
Guiding cameras: QHY CCD QHY 5 II
Focal Extender / Reducer: Tak QE 0.73x
Software: PHD 2, Astro Pixel Processer, PixInsight , Sequence Generator Pro SGP
Filters: Astrodon SII, Ha, OIII, + Astrodon RGB
Accessories: ATIK EFW3
Original Resolution: 4416 x 3596
Dates: Jul 18 - Aug 4, 2021
Frames:
Astrodon Ha: 42 x 600"
Astrodon SII: 45 x 600"
Astrodon OIII: 48 x 600"
Astrodon RGB: 3 x 10 x 180"
Integration: 24 Hours.
Center (RA, Dec):(304.569, 44.821)
Center (RA, hms):20h 18m 16.586s
Center (Dec, dms):+44° 49' 16.927"
Size:3.18 x 2.59 deg
Radius:2.052 deg
Pixel scale:2.59 arcsec/pixel
Orientation:Up is 234 degrees E of N
Here is another rendition of the same data - this time the RGB data is enhanced by the NB data - and shown as an RGB image.
Note how many more stars appear in an image like this compared to the NB image - but the NB image, as always, has the detail.
Note how many more stars appear in an image like this compared to the NB image - but the NB image, as always, has the detail.
Sometimes a Mono Image can also look good:
Sky Map
Below: Simply RGB. It may not look like much; but this 1½ hours of RGB data was very crucial for making both the above images.
Annotated Image
